Electrochemical characterization of La0.6Ca0.4Fe0.8Ni0.2O3-δ perovskite cathode for IT-SOFC

N. Ortiz-Vitoriano, Anne Hauch, I. Ruiz De Larramendi, Carlos Bernuy-Lopez, Ruth Knibbe, T. Rojo

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Electrolyte supported symmetric cells featuring La0.6Ca 0.4Fe0.8Ni0.2O3 (LCFN) electrodes are studied by electrochemical impedance spectroscopy. The aim is to describe the polarization losses of this mixed ionic electronic conductor electrode at various cell operating conditions for cells sintered at different temperatures. An equivalent circuit describing the cathode polarization resistances was constructed from analyzing impedance spectra recorded at different oxygen partial pressures and temperatures. Favorable oxygen reduction reaction properties are demonstrated for the LCFN cell sintered at 750 C with a polarization resistance of 0.05 Ω cm2 at an operating temperature of 800 C in pure oxygen. © 2013 Elsevier B.V. All rights reserved.
Original languageEnglish
JournalJournal of Power Sources
Volume239
Pages (from-to)196-200
ISSN0378-7753
DOIs
Publication statusPublished - 2013

Keywords

  • Calcium
  • Electrochemical impedance spectroscopy
  • Electrolytic reduction
  • Electrophoretic coatings
  • Nickel
  • Sintering
  • Solid oxide fuel cells (SOFC)
  • Spectroscopy
  • Cathodes

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